<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
#div1 {width:200px; height:200px; background:red; position:absolute; top:50px; left:0px;}
</style>
<script>
function startMove()
{
	var oDiv=document.getElementById('div1');
	
	setInterval(function (){
		oDiv.style.left=oDiv.offsetLeft+10+'px';
	}, 30);
}
</script>
</head>

<body>
<input id="btn1" type="button" value="开始运动" onclick="startMove()" />
<div id="div1">
</div>
</body>
</html>
